CN2337732Y

CN2337732Y - Imitating coaxial loudspeaker sounder resonator

Info

Publication number: CN2337732Y
Application number: CN 98227462
Authority: CN
Inventors: 梅风
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-27
Filing date: 1998-07-27
Publication date: 1999-09-08
Anticipated expiration: 2008-07-27

Abstract

The utility model relates to an imitating coaxial loudspeaker sound box which is composed of a box body I, a box body II and a frequency divider, wherein, a super-low tone loudspeaker is independently arranged in the box body II. The utility model is characterized in that the box body I adopts an imitating coaxial structure and adopts four or six middle-low tone loudspeakers; a high tone loudspeaker is used as a centre; the middle-low tone loudspeakers are uniformly arranged at the periphery of the high tone loudspeaker in an equidistant mode; the middle-low tone loudspeakers are mutually connected in a parallel series mode, and are connected with an output terminal line of the frequency divider through connecting terminal lines. The utility model has the advantages of a coaxial loudspeaker sound box and a voice box that polarization is good; simultaneously, the playback power for middle tone and low tone is improved, and the distortion is reduced, which improves playback effects.

Description

Imitative coaxial loudspeaker audio amplifier

The utility model relates to audio amplifier, more particularly, is a kind of audio amplifier that is made of casing I, casing II and frequency divider.

The coaxial loudspeaker audio amplifier is applied in the prior art owing to have the advantage that acoustic image is had good positioning.But, simultaneously because assembly space is limited, and each frequency range has only a loud speaker, and power is restricted, during high-power playback distortion bigger, the acoustic radiation directive property of intermediate frequency is wide inadequately.Because each unit concentrates on the same axle center, mutual close together, each unit disturbs bigger each other, and frequency characteristic is degenerated, and is easy to generate intermodulation distortion.In addition, in coaxial loudspeaker (especially three frequency division coaxial loudspeaker), because each unit arranged in co-axial alignment, the activation point of each unit (voice coil loudspeaker voice coil) is unequal apart from the distance of listening to the position, produces phase distortion during playback.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and a kind of imitative coaxial loudspeaker audio amplifier is provided.When keeping the good advantage of coaxial loudspeaker audio amplifier acoustic image polarization, by bass playback power in improving, reduce distortion, improve playback effect.

The purpose of this utility model is achieved through the following technical solutions.

The utility model is made of casing I, casing II and frequency divider, in described casing II, super woofer is set independently.

Design feature of the present utility model is that described casing I is imitative coaxial configuration, adopts four or six medium and low spectrum loudspeakers, is the center with the high pitch loudspeaker, and each medium and low spectrum loudspeaker is equidistantly uniform in its periphery.Described each medium and low spectrum loudspeaker connects for connection in series-parallel each other, and connects the frequency divider output line with its connection end line.

Compared with the prior art, the utlity model has following advantage:

1, medium and low spectrum loudspeaker power is big.In sound-source signal, most energy is all in the medium and low frequency section.Therefore, it is should be as far as possible big to be used for the power of loudspeaker of medium and low frequency section playback.The utility model uses many medium and low spectrum loudspeakers simultaneously, and the power of medium and low spectrum loudspeaker can get a promotion easily.

2, middle bass distortion is little.During the loud speaker playback, input power is big more, distortion is then big more.The utility model audio amplifier has been owing to used many medium and low spectrum loudspeakers simultaneously, bear respectively by many loud speakers during high-power input, thereby, each loud speaker bear power less (amplitude of vibrating diaphragm is less), distortion is less.

3, middle pitch directive property is wide.The utility model uses many loud speakers simultaneously at Mid Frequency, has enlarged the directive property of intermediate frequency.When adopting the curved surface baffle, directive property is wideer.

4, interfere with each other little, frequency characteristic good, intermodulation distortion is little.Keeping suitable distance between each loud speaker of the utility model, compared with the prior art, can obviously reduce mutual interference, and can adjust and obtain straight frequency characteristic, lower intermodulation distortion.

5, phase distortion is little.The utility model can make the voice coil loudspeaker voice coil of each loud speaker be in same plane basically, thereby can improve phase distortion greatly by suitably adjusting the front and back position of loud speaker.

6, the utility model is simple in structure, manufacture difficulty is low.Especially compare with high-fidelity, bigbore coaxial loudspeaker audio amplifier in the prior art, its cost reduces greatly.

Fig. 1 is the utility model master TV structure schematic diagram.

Fig. 2 is the utility model side-looking structural representation.

Fig. 3 is the utility model medium and low spectrum loudspeaker frequency dividing circuit schematic diagram.

Fig. 4 is the utility model high pitch loudspeaker frequency dividing circuit schematic diagram.

Fig. 5 is the utility model super woofer frequency dividing circuit schematic diagram.

By the following examples, in conjunction with the accompanying drawings the utility model is further described.

Embodiment:

Referring to accompanying drawing 1,2, in the present embodiment, casing I 4 adopts four medium and low spectrum loudspeakers 2 for imitative coaxial configuration.On positional structure, be the center with high pitch loudspeaker 1, each medium and low spectrum loudspeaker 2 is equidistantly uniform in its periphery, and each loud speaker 1,2 can adopt floor plan, also can adopt curved surface to arrange.In order to reduce phase distortion, adjust the forward and backward position of each loud speaker, make its voice coil loudspeaker voice coil be in same plane basically.Medium and low spectrum loudspeaker 2 also can be six, is the center with high pitch loudspeaker 1 equally, and six medium and low spectrum loudspeakers 2 are equidistantly uniform in its periphery.

In casing II 5, super woofer 3 independently is set, in this enforcement side, the frequency divider part-frequency point of super woofer 3 is below the 300HZ.People's ear can't carry out the acoustic image location for the sound below the 300HZ.Therefore, part-frequency point is set in 300HZ when following, and bass is directionless sense, and the acoustic image location is main finishes by the casing I.Under the effect of the imitative coaxial acoustic image accurate positioning that guarantees the audio amplifier I.Can adopt bigbore super woofer, the subwoofer effect is improved greatly.

As shown in Figure 3, four medium and low spectrum loudspeakers 2 are being connected in series after the parallel connection in twos on the circuit structure in the present embodiment, and connect a branch device output line with its series connection end line.

Element C1, L1 among Fig. 4 constitutes high pass filter, for high pitch loudspeaker 1 provides high-frequency signal.

Element L4, C4 among Fig. 5 forms low pass filter, and the low frequency signal of three frequency division is provided for super woofer 3.

Element L3, C3 among Fig. 3 forms low pass filter, in order to the filtering high-frequency signal.Choosing of this signal cooperates circuit shown in Figure 4 to constitute two divided-frequency loud speaker divider circuit.At this moment, the audio amplifier I is used separately as the two divided-frequency audio amplifier.

Element C2, L2 among Fig. 3, C3 and L3 form band pass filter, and the choosing of this signal cooperates high pitch shown in Figure 4 raise one's voice frequency dividing circuit and super woofer frequency dividing circuit formation three frequency division loud speaker divider circuit shown in Figure 5.At this moment, audio amplifier I and audio amplifier II all come into operation, and become the three frequency division audio amplifier.

In the present embodiment, can adopt Active crossover signal or Passive signal respectively by the different choice of K switch 1, K2, K3 and K4.As Fig. 3, Fig. 4 and shown in Figure 5, end line A, C, end line D, G, end line H, J are Active crossover signal end line among the figure; End line B, C, end line E, G, end line F, G, end line I, J are Passive signal end line.

Imitative coaxial audio amplifier in the present embodiment can be operated in two divided-frequency or three frequency division, therefore, audio amplifier I and audio amplifier II also can also be designed to split-type structural so that use the audio amplifier I separately when two divided-frequency except that being made as overall structure, and when three frequency division, be used in combination audio amplifier I and audio amplifier II.

Claims

1, a kind of imitative coaxial loudspeaker audio amplifier, constitute by casing I (4), casing II (5) and frequency divider, in the fast casing II of institute (5), super woofer (3) independently is set, it is characterized in that described casing I (4) is imitative coaxial configuration, adopt four or six medium and low spectrum loudspeakers (2), with high pitch loudspeaker (1) is the center, each medium and low spectrum loudspeaker (2) is equidistantly uniform in its periphery, institute's each medium and low spectrum loudspeaker of speed (2) connects for connection in series-parallel each other, and connects the frequency divider output line with its connection end line.

2, imitative coaxial loudspeaker audio amplifier according to claim 1, the frequency divider part-frequency point that it is characterized in that described super woofer (3) is below the 300HZ.